Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q1/00—Details of, or arrangements associated with, antennas
  • H01Q1/12—Supports; Mounting means
  • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
  • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
  • H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
  • G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
  • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
  • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
  • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
• • G—PHYSICS
  • G06—COMPUTING; CALCULATING OR COUNTING
  • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
  • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
  • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
  • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
  • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
  • G06K7/10346—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the far field type, e.g. HF types or dipoles
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
  • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
  • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
  • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
  • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
  • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
  • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
  • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
  • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
  • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
  • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
  • H04B7/0842—Weighted combining

Definitions

• 0001 related to the tag system for clearing or writing only to wireless tags that can communicate information with the outside via wire.
• the reader / writer responds to the inquiry and response by touching the tag as a question, so that the system can capture only the information from the wireless tag (ado eec de f cao).
• 0003 A wireless tag provided on a tag without a tag, a C for storing predetermined tag information, and an antenna connected to the C for receiving the information are provided. Even when it is not visible, the D-writer can access C (take in information only), and it can be used in the fields of merchandising and inspection, as well as the movement of objects and people. Practical use is expected.
• the transmission value is gradually increased, the groups responding within the region corresponding to the value are sequentially identified, and this is repeated to repeat the tag. Recognize the location by dividing it into several areas. At this time, the directionality of the device antenna was not particularly changed, and the signal was relatively transmitted to the wireless tag.
• the signal is transmitted to the wireless tag relatively, and the deviation is wide with directivity.
• the groups located within the area are recognized as a unit, so to access them individually, the tag information section must be specified sequentially and a separate search must be performed.
• the larger the number the more rapidly the interval will increase.
• wireless tags are dispersed over a wide area, it takes a lot of time to access each tag, and efficient wireless tag information
• the information communication is performed without contacting the tag c of the query object, and the directivity of the number of antennas at least in accordance with the separation of the communication.
• Directivity control means controls the antenna directivity according to the information communication distance, so that the directivity can be used for short and long communication distances, and optimal antenna characteristics can be realized. .
• the wireless tag information can be efficiently transmitted in a short time, compared to a structure in which the antenna directivity is the same whether the communication distance is short or long.
• the directivity control means increases the directivity by the number of antenna elements when the separation is short, and sets the directivity by the number of antenna elements when the separation is long.
• the directivity control unit maintains the directivity of the number of antenna elements so as to be stronger in only one direction, and sequentially changes the direction. It is characterized by having direction means.
• the direction is sequentially changed by increasing the directivity combined by the plurality of antenna elements in one direction by the means, and a predetermined calculation process is performed according to the degree and phase of the antenna element in each direction.
• the means may be such that when the separation is short, the switching direction of the directivity is large, and when the separation is long, the directivity is small. It is characterized in that the reversal interval is increased.
• the communication range is limited even if the directivity is widened and the directivity () is changed at a large interval. Therefore, the number of wireless tags existing in the communication range is also limited, and efficient information and communication separation are performed. If the information is long, the directivity is changed by changing the directivity () at intervals, and by limiting the communication area in order, the information becomes more reliable and more efficient. Information on wireless tags can be sent.
• the directional control unit is characterized in that the directivity by the number of antenna elements is optimized so that the reception sensitivity to the tag elements is optimal.
• a method based on adaptive control that performs predetermined arithmetic processing according to the antenna power and frequency is used to detect the radio tag at high sensitivity and at the same time to detect the direction and its location. Estimate the position It is possible to
• the directivity control means may include an antenna stage for increasing or decreasing the number of antenna elements used by the number of antenna elements according to at least the distance of the broadcast communication. It is characterized by having.
• the antenna stage increases or decreases the number of antenna elements used in accordance with the broadcast distance, thereby using the directivity by changing the number of antenna elements used when the communication distance is short and long. Optimal antenna directivity can be realized. [0121] In the above item 6, the number of antenna elements used by the number of antenna elements is increased when the distance between the antenna and the broadcast communication is long.
• the direction control means has a number of wireless tags for detecting the number of the tags present in the communication area, and is detected by the number of tags.
• the directivity is controlled by the number of antennas according to the number of wireless tags.
• the direction control means controls the antenna direction not only according to the number of wireless tags but also according to the number of wireless tags present in the surrounding area, so that the number of wireless tags is small.
• the directivity can be used properly, and the optimal antenna directivity can be realized. As a result, wireless tag information can be obtained more efficiently and in time.
• the method is characterized in that it has power control means for increasing or decreasing the communication power at least in accordance with the separation of the broadcast communication.
• control means increases or decreases the communication power in accordance with the information communication distance, the communication power can be reduced depending on whether the communication distance is short or long, in other words, the transmission distance of the radio wave can be used properly. Achieve optimal communication environment with antenna directivity It becomes possible.
• the area is divided into several areas and set according to the number of the tags existing or expected to exist in the communication area determined by the communication power and the directivity. It is characterized in that the tag and the signal corresponding to the tag are displayed for each of the dividing stages.
• the communication area is divided into small areas according to the small number of radio tags in the communication area determined by the communication power and the directivity.
• the information is not exchanged with the tags in the area at once, and the area can be divided into small areas and the information can be exchanged with the wireless tags every time. Become. By doing so, it is possible to receive raw RFID tag information.
• An access report first generated by the access stage in response to at least the direction control of the direction control by the direction control means and the control of the transmission power by the direction control means. And an access means for controlling the kind of the service.
• the access means controls the type of access generated first according to the directivity control of the directivity control means, so that the type of access information is used differently when the directivity is narrow and when the directivity is wide. It is possible to realize a kind of access information. As a result, wireless tag information can be obtained more efficiently and in time.
• the access means may be a conditional instruction for the access stage to unconditionally acquire the tag information of c above in response to the control of the directivity by the directivity control means. , With the condition for acquiring the tag information of c under a predetermined condition It is characterized by controlling the generation of the delay of the instruction to search and obtain the tag information of the instruction and C under uncertain conditions.
• the directivity control means spread the transmission power to generate the conditional command by transmitting the directivity to the tag, and transmit the conditional command to the tag. It is characterized by performing control in cooperation with each other.
• the directional control means, the control means, and the access means first generate the conditional instruction after the directional spread of the transmission power, and It is characterized in that control is performed in cooperation with each other so as to be transmitted to the user.
• Directivity Directionality is high only in a small area that is determined by small communication power, and information can be efficiently transmitted by wireless tags and unconditional instructions.
• the means performs the control in cooperation with each other such that the command is generated with the transmission power reduced and transmitted to the tag.
• Directivity In a limited area that is determined by small communication power, efficient information can be obtained by dense radio tags and commands and conditional commands. [0096] In the above item 2, the directivity control means, the control means, and the access means first generate the conditional instruction after making the transmission power large, and the tag element It is characterized in that control is performed in cooperation with each other so as to be transmitted to the user.
• the directional control means, the means for controlling, and the access means according to the above-mentioned item 3, wherein the command is generated by widening the transmission power to generate the command and transmitting the command to the tag.
• the command is generated by directing the transmission power, the command is transmitted to the tags, and the transmission power is further directed. Control is performed in cooperation with each other such that the conditional instruction is generated first and transmitted to the tag.
• the communication power is reduced, the directivity is reduced, the mobile communication area is divided, and a search command is first generated to generate information. Then, when the reception of information is completed by the tag of the question, the transmission power is made highly directional, an unconditional instruction is generated first, and the information of the information is efficiently transmitted to the remaining wider range of the tag.
• the directivity control means, the control means, and the access means generate the command by spreading the transmission power to the directivity, and transmit the command to the tag.
• the signal power is spread to generate the condition command, transmitted to the tag tag, and further transmitted.
• control is performed in cooperation with each other such that the conditional power is generated by directing the transmission power and the conditional instruction is transmitted to the tag.
• the communication power is increased, the directivity is increased, an unconditional instruction is generated, and information is efficiently transmitted over a wide communication area. Then, when the reception of information is completed by the tag of the question, the transmission power is made highly directional to generate an unconditional command, and the information of the information is efficiently transmitted to the remaining tags of the wider range.
• the directivity is used in the case where the communication distance is short and the case where the communication distance is long, and the optimum antenna directivity is realized.
• Information on wireless tags can be sent.
• FIG. 3 is a block diagram illustrating an example of the functional configuration of a wireless tag device provided in the wireless tag illustrated in FIG.
• FIG. 4 is a functional diagram showing an active configuration of a high-frequency path provided for the question shown in FIG.
• the control path shown in Fig. 5 is a chart that represents the row control procedure in order to perform directivity control with 5 antennas.
• FIG. 9 is a chart representing the operation procedure in order to execute the directivity control in the antenna.
• FIG. 10 is a diagram showing an action in a row where only the adaptive adaptation is performed.
• 11 is a chart showing a control procedure related to the adaptive control performed by the control path in FIG.
• FIG. 14 is a diagram illustrating the operation of a modification in which a received signal is adaptively processed instead of being subdivided into 12 areas and transmitting a command.
• 004 represents an abbreviation of the wireless tag system to which the present embodiment is applied. Stem.
• the tag system S is composed of a number of tags corresponding to the tag system S according to the present embodiment.
• a tag O and a wireless tag o having an antenna 5 and a C 5 are provided.
• the antenna 5 of the wireless tag o receives a signal by wireless communication with the antenna 5 of the wireless tag o. It has a frequency 2 for the matrix, a 3 for processing the signal read from the wireless tag o, and a control 4.
• the antennas are arranged at a predetermined distance from each other, and the directivity as an antenna body is controlled by electrons by the directivity control described later.
• Reference numeral 504 denotes a so-called icon, which is described in detail, is composed of a central processing unit, such as CPRO, and uses the time storage function of the CPU to process the data according to the program stored in O. It is a line.
• FIG. 552 is a block diagram showing an example of the functional configuration of the wireless tag o provided in the tag.
• the wireless tag o is located above the antenna on the above side.
• Antenna and C5 connected to the antenna 5.
• C5 rectifies the power received by the antenna 5 52, accumulates the green onion flowing through the 52 and uses it as a kinetic power source of C5 53, and the wave received by the antenna 5
• a cook 54 that extracts the cook signal and supplies it to the control 57, and 55 that functions as information that can store a predetermined signal, is connected to the antenna 5 described above.
• the tune 56 modulates the signals received from the antenna 5 based on the signals received from the antenna 5 based on the signals received from the antenna 5 and the like.
• 55757 interprets the received signal adjusted by 56 above, and
• a reply signal is generated based on the information signal stored in 55, and the basic control of the control returned in 56 is executed.
• 006 03 is a function representing the active composition of the high frequency 2 provided above.
• the radio frequency 2 includes: a directivity 2 connected to the above-mentioned antenna having a transmitting / receiving function, a transmitting unit 2 2 for transmitting a signal from the antenna to the wireless tag o via the directivity 2; It is composed of a receiving section 23 for receiving the information of the wireless tags o received by the antennas.
• the directivity 2 is obtained by adding the powers of the antennas 2 to 2 related to the antenna (to be referred to as the following), the receivers 2 2 to 2 2 related to the antenna 1 and the receivers 2 2 to 2 respectively. 3 is connected in one direction to the transmitting antennas 2 to 2 or the receiving antennas 22 to 22 2, that is, the signals from the transmitting antennas 2 to 2 are transmitted to the antenna 1 24 to 24 for transmitting the signals to the receivers 22 to 22 (for example, consisting of Sakida and the like, hereinafter).
• Units 2 to 2 are input to the signals from the control 4 and the phase shifts 25 to 25, which variably set the phase of the radio signal at the antenna to the corresponding signals, and the signals to the control 4 Included are amplitude signals included, and amplifying signals input from phase shifts 25 to 25 in accordance with the input signals, and gain amplifiers 26 to 26 corresponding to the above 24 to 24, respectively.
• the units 22 to 22 input the signals from the control 4 and variably set the phase of the received radio signal at the antenna to according to the input.
• the phase shifts 27 to 27 and the signals from the control 4 And the reception gain amplifiers 28 to 28 for amplifying the signals input from the phase shifters 27 to 27 in accordance with the input and amplifying the amplified signals.
• transmission gain amplifiers 26 to 26 may be replaced by variable amplifiers instead of gain amplifiers 28 to 28.
• the communication unit 22 accesses the tag information of C5 of the wireless tag o (an oscillation circuit for generating a matrix for fetching or a P-controlled oscillation circuit 25; In the example of modulating the generated signal based on the supplied signal, based on the XS signal from control 4 and the like, the amplitude is adjusted to 26 (amplifying amplifier for amplitude adjustment, etc. may be used). You. This is desirably 9 z or 2.45 Gz, and the harmonic modulated by the above 26 is supplied to the above 2 to 2 and further transmitted and received by the 2 to 2 4 antennas. Supplied to C5.
• the transmission unit 23 receives the signals received by the antennas
• the reception 2 8 is multiplied by the wireless tags o and 2 generated in 2 3
• the received signals 222 and 225 are also input to the (Receved gna enghndcao) 226, and the SS indicating the frequency of those signals is input to the signal 3.
• the tuning of the wireless tags o is performed according to the key.
• 00683 performs the constant arithmetic processing input from the high-frequency signal unit 23 described above, and modulates the modulation signal in accordance with this.
• control 4 performs the above operations 2 to 2 22 to 22 according to the result of the arithmetic operation of the above 3.
• this 4 is connected to a communication line via, for example, an input / output interface (not shown), and the Shintosa, other terminals,
• the directivity of a plurality of antennas is controlled so that the directivity is strengthened in only one direction, and the directions are controlled sequentially.
• Signals are transmitted by using the fact that when the antenna is tilted at a high angle with respect to the antennas, the difference in the phase of the radio wave appears only at those antennas.
• the phase it is possible to direct the direction of the radio tag toward the direction of the wireless tag. (Also, by controlling the phase as described above, the phase is generated only in the signal on the path.
• a matrix of signals with directivity according to the location of the wireless tag when a large number of tags are widely distributed, according to (communication) from a question to a tag, Antenna ⁇ Directivity by Gosuru By, vinegar for the tag o at more than hour radio tag report of ⁇ maximum of that of the tag of It is.
• 007 4 represents the above-mentioned directional operation of the antenna ⁇ .
• the 2 is capable of changing the directivity of the antenna and the sharpness and the direction of the transmission and changing both of them. Particularly in this example, when the communication distance is short, the directivity of the antenna is widened (the beam width is increased). If the communication distance is long, the directivity by the antenna is reduced (the beam width is narrowed).
• the directivity of the antenna is assumed to be the character (most widely), and a search for a relatively long distance from the antenna is performed (4a)).
• the directivity of the distance is slightly increased. ⁇ ⁇ .
• step S the size of the antenna is set to its head ax5 and the increase interval is set to 2, and further, in the example of the direction of the antenna of the book, the direction of the antenna is increased only in one direction. Certain criteria (for example, one direction from the viewpoint of a question) when holding and changing the direction (IaI).
• the direction is 9 and the other direction is the large direction.
• Directivity (, 0N as the beginning of directional geometry, directional 0 in order.
• control 4 outputs the signal 3 and generates the XS signal, and outputs the signal to the transmission 26.
• the transmission 26 performs the above-described adjustment and becomes the coA signal as the access information.
• 4 generates an XPW signal and outputs it to the above-mentioned units 2 to 2
• the transmission amplifiers 26 to 26 perform signal width based on the XPW signal based on the XPW signal (gain). If there is an antenna, it is appropriate to use it.
• the phase is determined by the signal, and finally transmitted via the antenna ⁇ , and the radio tag of the elephant is It encourages the communication of tags o, etc. Note that since this time is common to all hands, the following will be explained. Consist, send
• step 3 it is determined whether there has been a wireless tag responding in the above-described manner (for example, the tag has been notified). If the responded wireless tag is, and the information is successfully obtained, the condition of step 35 is satisfied, and the process proceeds to step 37, in which a step command is transmitted and the step is performed.
• step 37 the information of the wireless tag can be obtained without performing a complicated step of specifying the wireless tag by repeatedly transmitting the command and the conditional command described below, and the information can be obtained efficiently.
• the number of responding wireless tags is 2 or more, the information acquisition fails due to a collision (when a valid signal for the vibration is received but the acquisition fails), the condition of step 35 is not satisfied, Go to step 4.
• step S4 the command for the wireless tag in the above-mentioned 0 cases is issued.
• the part of D () is specified in the Png number, and the response from the corresponding wireless tag is temporally separated and extracted. In this way, they are separated in time
• the detected wireless tag further obtains all the items of D using the coD number, and when the acquisition is completed, sleeps in that spun (do not answer).
• the tag is completely and individually detected for each tag for which a response was detected in the step and step.
• Step 37 When step 4 is completed, return to step 2 to output the co-AD signal, which is an unconditional tag command for the wireless tag, as described above. Wireless No response will be given if dormancy has ended and the child has been dormant. As a result, the condition in step S3 is not satisfied, and the process proceeds to step S5.
• step S6 in which is determined, for example, a value larger than the above nd (9). At this point, 0N (0.) was added to the initial 0 (01.).
• step S6 the value becomes 0 and becomes larger than nd, so that the condition of step S6 is satisfied, and the process proceeds to step S7.
• step S7 it is determined, for example, that the antenna ax is set to 5). As described above, if, this condition is not satisfied, and the routine goes to Step S8.
• step S8 two are added to the above-mentioned antenna in the above-described example (therefore, the number is increased from three to three at first). This gives 0.0N 4.
• step 2 to step 4 as described above, the co A D is transmitted, and after responding to the request, N (9.) is added to step S5. 45. To increase. Since the value of 0 is smaller than nd, the condition of step S6 is not satisfied, and the process returns to step S2, and the direction is 045. Repeat the same search with. This gives 0.
• step 045 After transmitting coA D and sleeping in response to this, N (9.) is further added to 0 in step S5, and 0 is set to 45. Et al. To increase. If this value is larger than nd, the condition in step S6 is not satisfied, A is added to in step S8 through step S7 (that is, 5), and the process returns to step S2 again. 0090 and furthermore, coA D transmitted in step to step S6
• Step S6 which is larger than nd, is shifted to step S7. If the value is 5 at this point, the condition of step S7 is satisfied, and the process is completed.
• the antenna C constitutes the above antenna element.
• the directivity 2 of the high frequency 2 and the control 4 constitute a directivity control means for controlling the directivity by a plurality of antenna elements at least in accordance with the separation of the information communication.
• Directional means provided by a plurality of antenna elements so that the directivity is strengthened in only one direction, and the directions are sequentially changed.
• the order of step 8 of control 4-5 constitutes an antenna stage for increasing or decreasing the number of antenna elements used by a plurality of antenna elements at least in accordance with the separation of information communication.
• the optimum antenna directivity is realized by using the directivity between the case where the communication distance is short and the case where the communication distance is long, so that the antenna directivity is the same when the communication distance is short and long.
• the wireless tags o are dispersed over a wide area (when the number of wireless tags is not very large)
• the wireless tag information can be efficiently and quickly obtained.
• the direction of the antenna can be increased ().
• the direction of the short-range antenna at a short distance is increased, then Since the receiving sensitivity and the receiving sensitivity of the device become too large, it is difficult to efficiently output the wireless tag.
• the above-mentioned harm is avoided by widening the directivity at short distances while realizing directivity for long-distance communication, and realizing optimum antenna directivity according to the distance You can do it.
• the number of antennas to be used in a short distance is relatively reduced.
• the beam width of the radiated radio wave is widened (4 (a) 4 (b)), and there is also a result that the following of the wireless tag can be improved.
• the beam width is narrowed (4c)), and there is an effect that a strong wave can reach far.
• Fig. 7 conceptually shows the directional operation of the antenna 2 according to the embodiment 2 having the same configuration as the question, and is a diagram corresponding to 4 in the above embodiment.
• the directivity 2 of the high frequency 2 can be switched between the antenna, the directivity, the sharpness, and the direction.
• the directivity of the antenna is assumed to be sex (widest), and the transmission power is minimized, and the search for a relatively longer distance from the antenna is performed (6 (a) 0100 And send at the same time Increase the force to change the cable, especially in the case of changing the directionality to several times 2) and divide the cable into two 2 2 (6b)
• 0101 Move to 7 and use the same method to further narrow down the distance, G, and so on in order to further narrow the direction and further increase the transmission power to search.
• the number of times of switching the directivity direction is sequentially set
• switch to 3 to 23 for G switch to G for 4 GG, switch to G2G3G4, and switch to 5 for 2 345 to change the line.
• Reference numeral 0128 denotes a feature that is the most significant feature of the present embodiment, ie, the search operation based on the above-described division.
• the above-described search operation at a distance from the antenna to a relatively large distance is shown. That is, if many tags are detected at once by the search for the tag described in 6 (a) (or it is estimated that there are many tags at once) (8 (a)), the directivity Then, the direction of the directivity is sequentially changed so that the number is further divided into d to d7 in the example 7), and the search for d to d7 is performed sequentially.
• Numeral 11049 is a cha that represents the control procedure of the embodiment 2-4 in order to execute the directivity () in the above-mentioned antennas.
• step set the antenna's head to m5 and the above-mentioned division to 4 to not perform.
• the directionality of the antenna of the book in the direction of ⁇ ), one direction is strengthened and the direction is changed (either or beaming).
• step S 2 the transmission power is (W) P P (for example, P P 2 P 3 P 4 P 5.
• step S3 the process moves to step S3, and returns to the above-mentioned "0" (initial 1).
• coAD signal which is an unconditional tag command for the wireless tag, and receives the answer (if any).
• the steps are the same as those in step 5 in the above-mentioned state at the time of signal generation, description will be made.
• the detailed procedure at the time of this process is common to all the commands in the above-mentioned state. If there is a wireless tag that has responded to the coAD signal, the reply (wireless tag including ply and information) transmitted from the tag o is received from the antenna and received and controlled by the receivers 22 to 22. After that, it is taken in by 3 through the 23 frequency unit 23.
• step S4 the wireless tag responded according to the above-described process. Determines where (the tag was known). If at least one of the RFID tags has been replied (if a response signal to the bokeh is received), the determination is satisfied and the routine goes to step S5, where the tag information of the tag o of those tags is successfully obtained. (In other words, the number of reply tags is, and the information could be obtained only by simultaneous communication by the unconditional tag command).
• step S 5 If the tag information is acquired normally, the condition of step S 5 is satisfied and the step S 5
• step 6 The process proceeds to step 6, and a sp () command is issued for the tag that has been completed by receiving the information (the reception of the tag information has been completed). .
• the p-number is output, and the process returns to step S3 to repeat the same order.
• step S5 If the wireless tag information has not been normally acquired in step S5, the condition is not satisfied, and the routine goes to step S7.
• step S7 the Png (Png D) signal, which is a command for the wireless tag in the above-mentioned 0 cases, is output, and the signals sequentially returned are received.
• the part of D () is specified in the Png number, and the response from the corresponding wireless tag is temporally separated and extracted.
• step S8 The process proceeds to step S8, and if the number of the wireless tags detected temporally separated and detected as described above in step S7 is very large (in other words, it will be described later) Each time it is difficult to obtain unless it is divided into sub-areas and searched again, 8 (a), which is a collection of many wireless tags, is determined. This can be determined from () of the detection line. If there is no LA, if there are few, the wireless tag is O (do not gather), if there is no LA, there are many (collect) wireless tags. If they have not been collected so far (in the case where a certain number of tags are detected in step S7 but they are not enough to search in a small area), this condition is not satisfied, and the process proceeds to step Sg .
• step Sg as in step S4 in step 5, Png (Png D), which is the command for the wireless tag in step 0 above,
• Png Png D
• a sp command eep signal
• the radio tags which are temporally separated and detected by the Png number are further obtained individually by using the coD number, and when the acquisition is completed, the step is performed. Sleep (do not answer).
• the tag is completely detected individually for all tags for which a response was detected in step S7.
• the process moves to step S25 (described later).
• step S8 if the number of wireless tags detected in step S7 is extremely large, the condition in step S8 is satisfied and the process proceeds to step S8.
• the antenna at this point does not perform the above-described division, but determines from o (4).
• step S2 the directivity by the subdivision area described above is used.
• step S22 the flow shifts to step S22, and in the same manner as in step Sg described above,
• step S7 By outputting the Png (Png D) signal, which is a command for the wireless tag, and the coD signal, which is a conditional command, and receiving the response, a response is made according to the process of step S7. Recognize all tags (outputs the eep signal, which is an instruction, for tags that have been completed (tag information reception has been completed) along with a matrix of tag information).
• step 4 it is determined whether or not is larger than 0 end.
• Step 4 From 6 end of 0123, the condition of Step 4 is not satisfied, and the process returns to Step S22, where the directivity is 0.
• the search was performed while switching the orientation 0 by shifting the orientation 26 sequentially. Then, the search in the region d7 ends, and in step S23.
• step S24 When (26) is added, the value becomes larger than 0 end in step S24, the condition of step 4 is not satisfied, and the process proceeds to step S25.
• step 25 the point corresponding to the above-mentioned 0 for the orientation corresponding to the above (large).
• step S26 the flow shifts to step S26, where 0 is the value of nd (.
• Bigger throat Is determined. At this point, it is set to 0 by adding N (.) To the original (01.).
• step S26 Since it is larger than nd, the condition of step S26 is satisfied, and the routine goes to step S27.
• step S27 it is determined whether max (5) has been reached. As described above, if, this condition is not satisfied, and the routine goes to Step S28. In step S28, the following is obtained. This gives 45. 0 g. Four .
• the orientation 0 45 As described above in steps S3 to S4, the tag that has transmitted the coAD signal and obtained the wireless tag information is put to sleep, the area is subdivided, and the directivity is increased within the divided area (d5, 3). ) After searching using the Png (Png D), co D and eep to obtain radio tag information and sleeping the tag,
• step S26 The value of 0 is larger than nd, and the condition of step S26 is not satisfied, and the process returns to step S3, and the pointing is 04.
• the search is performed by 5 (6b) 7-2).
• step S3 to step 4 above coAD further obtains the wireless tag information using the Png (PngD), coD, and eep and sleeps the tag, and then proceeds to step S25. (9.) and add 0 to 45. Et al. To increase. If the value is larger than the 6end of 0, the condition of step S26 is not satisfied, and the process proceeds through step S27.
• Step S28 is set to (that is, 3), and the process returns to step S2 again. In the same manner, the same order is repeated until the value becomes 5 while increasing the value of. However, as described above, if the value is 4, Step S2 to Step 4 are not executed because the value of Step S2 is not satisfied at least, and the operation is not performed by the subdivision area (G to G4 to 5 are subdivided). )
• step S27 The condition of step S27 is satisfied, and the process of step 9 is completed.
• the directivity 2 of the high frequency 2 in the question 2 and the control 4 are the directivity control means for controlling the directivity by a plurality of antenna elements in accordance with at least the distance of the broadcast communication described above. Is composed.
• Step S2 is a power control that increases or decreases the communication power at least in accordance with the separation of information communication. Configure means. Further, steps S2 to S4 of this step are performed by dividing the area into several parts according to the number of wireless tags present or expected to exist in the communication determined by the communication power and the directivity. Configure the division to be set.
• the optimal antenna directivity is realized by using the directivity for short and long communication distances, and the radio tags o are dispersed over a wide area. Even if the wireless tag information can be obtained efficiently in a short time. In particular, since the directivity narrows as n increases, the probability of successfully obtaining information increases even if only the co-AD (condition tag) is transmitted first, and as a result, it is possible to efficiently perform all-wireless communication in a short time. Tags can be detected. Further, at this time, by increasing P to, it becomes easier to detect a tag at a longer distance, and since the tag is in the O-spread mode only at a shorter distance, the occurrence of unnecessary response signals is prevented.
• co-AD condition tag
• the communication area is divided into small areas (d to d7, etc.) according to the number of wireless tags in communication determined by the P directivity of communication. And every wireless tag o information. By doing so, it is possible to receive more efficient and efficient RFID tag information. That is, in general, if the wireless tags are to be output at a time over a wide area, there are many tags (especially wireless tags).
• the detection area is further divided into small d to d 7 etc. in the large with 6 As a result of the detection, the above-mentioned number is drastically reduced, so that detection can be performed in a short time.
• the directivity I / O may be set to the transmission only or the reception only.
• the transmission is performed with the gain of the input amplifier 22 2 2 2 and the gain of the input amplifier 2 6 2 6 2 6 as the antenna. You can change the transmission to ⁇ . The same applies to the case where only the message is received.
• the present invention is not limited to the ear control, but may be other directivity control.
• the control 4 directivity 2 allows the directivity synthesized by the antennas to be optimized so that the reception sensitivity to the wireless tag o is optimized, and a predetermined arithmetic processing is performed according to the antenna frequency and the antenna frequency. You can also use this method.
• (a) to (c) show, as an example of such a case, a case where the adaptation control is used only for reception.
• (a) shows a case where there are two tags 2 in a plurality of examples within a frame of the search performed in the above-mentioned state.
• (b) and (c) show the directivity when receiving adaptation is performed in this case, and (b) shows the receiving directivity so that the optimal directivity can be obtained for the tag on the side.
• (C shows the case where the reception directivity was changed so that the optimal directivity was obtained for tag 2 on the side. I do.
• the adaptation control may be used for reception, and the transmission may be done or beamed for transmission.
• it may be operated as an antenna for reception or reception only at medium distance f), or as a bi-o-guatena.
• step S142 first, in step S3, the phases of the phase shifts 27 to 27 and the gains of the gain amplifiers 28 to 28 are set to predetermined values.
• step S32 a co signal designating the tag o of the target wireless tag is output from the transmission packets 2 and 2 via the antenna 1 and the reply signal transmitted from the corresponding wireless tag o is output from the antenna 2 to Received by the receiving units 22 to 22, and fetched through the 23 frequency unit 23.
• the reception sensitivity is optimized by the directivity by the antenna 1.
• the control 4 performs a predetermined attachment for each of the antennas in the number of the receivers 22 to 22 relating to the antennas and repeats the transmission / transmission while varying the attachment. It is. Therefore, after the above-described step S33 is completed, in step S34, the weighting of the antennas is determined according to the value of the XS RSQ from the transmitter 22 224, and the corresponding phase is determined in step S35. And (gain) are set, and the corresponding phase signal is output to receivers 22 to 22.
• the stored value is compared with the value stored up to that time.
• the condition of 36 is not satisfied and the process returns to step 32 and the same calculation is repeated, and if the ratio is considered to be equal to or less than the predetermined value by then, it is determined that the calculation has converged.
• the directivity generated by the antennas is searched for so that the degree becomes the maximum value, that is, the optimum degree. If a signal is detected, the directivity is further optimized so that this signal becomes smaller. If the calculated value is substantially constant and the calculation converges, the condition of step S36 is satisfied. However, if not, the determination is not satisfied, and the process returns to step S32 and the same order is repeated.
• Step S32, step S33, step 4, step S35, and step S36 are repeated.
• the directivity at which the signal sensitivity is optimum is found for each of the antennas, the calculation is completed, and the condition of step S36 is satisfied.
• the direction of the tag and the direction of the antenna such as when the wireless tag is in the same direction.
• the tropism may show a maximum in multiple directions. Therefore, the estimated value or the estimated value of the tag is a probability value.
• step 37 the direction in which the tag is located is estimated based on the result
• step S38 the location in which the wireless tag is located is estimated based on the degree of the bundle.
• Adaptation is performed so that the reception sensitivity for the radio tag becomes optimum, and it is possible to detect the target wireless tag with high sensitivity and at the same time to estimate its location and location.
• step S2 If there are many wireless tags in (large), instead of subdividing the area in step S2, transmitting the Png signal in step S22, and switching the directivity in small steps in step S23, the signals from those wireless tags are replaced. It is also possible to detect the direction of the response by adapting the antenna and to direct the direction of the antenna only in that direction (b).
• next detection method a method of performing the next detection by repeating the Png signal, the coD signal, and the eep signal in step S4 in step 5 is used.
• the present invention is not limited to the use of the antenna C having the transmission / reception function as an antenna, and may be replaced with an antenna dedicated to transmission and an antenna dedicated to reception.
• a large number of tags and information can be obtained by an order within a large area determined by wide directivity and a large communication power.
• the probability of succeeding in receiving information by an unconditional command without using a limited number of tag commands increases within the range of 2 determined by the wide directivity and small communication power.
• information can be reliably transmitted by a limited number of tag information instructions within a narrow range determined by directional communication power. Wear.
• the communication power is increased to increase the directivity, a command is generated, and the command is transmitted to the wireless tags. If the number of responding wireless tags is large (equivalent to the number of wireless tags), the communication power is reduced. Information is generated by subdividing into small communication areas with small directivity and generating instructions. Then, when the reception of information is completed using the tag of question 2, the transmission power is generated with a high directivity to generate an information command, and the information is reliably transmitted to the tags in the range from the remaining two, so that the surrounding information can be obtained. Tag efficiency can be used to report wireless tag information.
• the communication power is increased to increase the directivity, a command is generated, and the command is transmitted to the wireless tags. If the number of responding wireless tags is small (corresponding to several wireless tags), the communication power is reduced. Generates information commands with a small directivity and attempts information in a limited communication area without first searching. Then, when the reception of information using the tag of question 2 is completed, an information command is generated with a large directivity of the transmission power, and the information is efficiently transmitted to the tags in the range from the remaining two tags. The efficiency of the tag can be used for wireless tag information.
• the signal 3 constitutes an access stage for generating an access report for accessing the tag report of the wireless tag C, and the communication section 22 of the high frequency 2 generates the access report in the access stage.
• the access information is transmitted to the wireless tag device by touch through multiple antennas, and the access is
• control 4 controls the directivity by the directivity control means and the control of the communication power by the power control means, and at least in accordance with at least the directivity control, the type of access information generated by the access stage.
• PC oba is a co-founder of the International Association, which is an organization that distributes goods, and the FOED Code Coc (CC), which is a US-based organization. It should be noted that a number conforming to other standards may perform the same function.

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